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AlmaLinux 8 : zsh (ALSA-2020:0903)

high Nessus Plugin ID 157578

Synopsis

The remote AlmaLinux host is missing a security update.

Description

The remote AlmaLinux 8 host has packages installed that are affected by a vulnerability as referenced in the ALSA-2020:0903 advisory.

 - In Zsh before 5.8, attackers able to execute commands can regain privileges dropped by the --no-PRIVILEGED option. Zsh fails to overwrite the saved uid, so the original privileges can be restored by executing MODULE_PATH=/dir/with/module zmodload with a module that calls setuid(). (CVE-2019-20044)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the affected zsh and / or zsh-html packages.

See Also

https://errata.almalinux.org/8/ALSA-2020-0903.html

Plugin Details

Severity: High

ID: 157578

File Name: alma_linux_ALSA-2020-0903.nasl

Version: 1.3

Type: local

Published: 2/9/2022

Updated: 2/14/2022

Supported Sensors: Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 5.3

Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2019-20044

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:alma:linux:zsh, cpe:/o:alma:linux:8, p-cpe:/a:alma:linux:zsh-html

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/AlmaLinux/release, Host/AlmaLinux/rpm-list

Exploit Ease: No known exploits are available

Patch Publication Date: 3/19/2020

Vulnerability Publication Date: 2/24/2020

Reference Information

CVE: CVE-2019-20044